{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1903-1CA00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1903-1CA00","canonicalUrl":"https://aoctrl.com/siemens/3RK1903-1CA00","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1903-1CA00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS F-kit for DOL starter DS1-X, 3RK1903-1CA00, safety category 4/PL e per ISO13849-1 up to SIL 3 IEC 62061.","salesMarkdown":"The Siemens 3RK1903-1CA00 is an F-kit for the DS1-X DOL starter, designed for the ET200S distributed solution local. It enables safety functionality up to Category 4 / PL e according to ISO13849-1 and up to SIL 3 per IEC 62061 — the highest performance level for a single DOL starter without a separate safety relay. The kit bundles an auxiliary switch block, a contact holder with connecting cable, and two contact carriers for the TM interface, so it drops into the existing DS1-X footprint and wiring scheme. ## Panel integration and wiring note The connecting cable between the auxiliary switch block and the contact holder is pre-terminated — no field wiring of the safety chain is required. The two contact carriers plug into the TM (terminal module) interface of the ET200S, so the safety signals are routed through the backplane bus rather than point-to-point. This keeps the panel wiring clean and reduces the chance of a miswire in the safety circuit.","metaTitle":"Siemens 3RK1903-1CA00 F-kit for DOL starter DS1-X, safety ca","metaDescription":"Siemens 3RK1903-1CA00 F-kit for DOL starter DS1-X. Safety category 4/PL e per ISO13849-1, SIL 3 per IEC 62061. Current lifecycle stage. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"lifecycle_stage":"current","Substance Prohibitance (Date)":"05/01/2012"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2506c84bc50fd54eb200b0e325c9c833.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=76055&mlfb=3RK1903-1CA00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1903-1CA00/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RK1903-1CA00 and get current pricing?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What safety level does the 3RK1903-1CA00 F-kit support?","answer":"It supports Category 4 / PL e per ISO13849-1 and SIL 3 per IEC 62061 — the highest performance level for a single DOL starter without a separate safety relay."},{"question":"What compliance documentation is available for 3RK1903-1CA00?","answer":"The substance prohibitance date of 05/01/2012 confirms RoHS compliance (lead-free, etc.) as of that date. The part also carries CE marking per the Siemens SIRIUS series standards."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1903-1CA00","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RK1903-1CA00 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}